Those three I recommend due to their legacy and hashing capacity. @mustangchefe and anyone with smallish capacity you will need to wait for the value of burst to surge for small amounts of coin to really appreciate your efforts perhaps to buy more capacity?
There's a plethora of second-hand disks for sale and or auction on eBay, amazon etc., new drives aren't essential because plots are written to disk once and read forever after by the miner so any hard disk would last beyond ordinary use.
New disks are best purchased from profits as a way to further invest and secondhand ones are ideal to get into the hash power..... and its less disappointing for beginners. like many or all other coins the block difficulty goes up due to mining popularity. THE POOLS I'VE RECOMMENDED ARE GOOD FOR MINERS UP TO 50TB and there are 50-50 pools for larger. those over 150tb i'd recommend the 100-0 pools or even solo mine.